Semantic MediaWiki/data/smw di blob

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< Semantic MediaWiki‎ | data
Revision as of 12:48, 26 January 2018 by Woozle (talk | contribs) (updated syntax highlight tags)
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About

  • Purpose: specifications for all SMW Objects that are text-blobs (i.e. long text which cannot be associated with a wiki page)
  • Refers to: smw_object_ids

SQL

CREATE TABLE `smw_di_blob` (
  `s_id` int(8) unsigned NOT NULL,
  `p_id` int(8) unsigned NOT NULL,
  `o_blob` mediumblob,
  `o_hash` varbinary(255) DEFAULT NULL,
  KEY `s_id` (`s_id`,`p_id`),
  KEY `p_id` (`p_id`,`o_hash`)
) ENGINE=InnoDB DEFAULT CHARSET=binary

Example

SELECT s_id, p_id
  , s.smw_namespace AS s_namespace
  , CAST(s.smw_title AS char) AS s_title
  , p.smw_namespace AS p_namespace
  , CAST(p.smw_title AS char) AS p_title
  , CAST(o_blob AS CHAR) as text
  , CAST(o_hash AS CHAR) as hash
FROM
    (smw_di_blob AS r
    LEFT JOIN smw_object_ids AS s ON r.s_id=s.smw_id)
    LEFT JOIN smw_object_ids AS p ON r.p_id=p.smw_id
ORDER BY s_id
  • p_namespace will probably always be the "property:" namespace, which defaults to 102 (unless there's some way to use a page outside that namespace as a property)